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OSI Systems Spacelabs Medical 90207 Service Manual

Ambulatory
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Ambulatory Blood Pressure
Monitor
90207/90207Q
Service Manual
070-0189-02 Rev. F
more time to care

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Summary of Contents for OSI Systems Spacelabs Medical 90207

  • Page 1 Ambulatory Blood Pressure Monitor 90207/90207Q Service Manual 070-0189-02 Rev. F more time to care...
  • Page 2 © 2004 Spacelabs Medical, Inc. All rights reserved. Contents of this publication may not be reproduced in any form without the written permission of Spacelabs Medical. Products of Spacelabs Medical are covered by U.S. and foreign patents and/or pending patents. Printed in U.S.A. Specifications and price change privileges are reserved.

  • Page 3: Table Of Contents

    Table of Contents Contents Introduction Overview................. 1-1 Description .
  • Page 4 90207 Ambulatory Blood Pressure Monitor Service Manual Calibration Procedures ..............4-8 Test Equipment Required .

  • Page 5: Introduction

    Introduction Contents Overview ............1 Description.

  • Page 6: Description

    90207 Ambulatory Blood Pressure Monitor Service Manual Description This ABP monitor is carried in a pouch that is strapped and/or belted at the patient’s side. Blood pressure and heart rate measurements are taken using a pressure cuff attached around the patient’s arm.

  • Page 7: Abp System Options

    90207 Ambulatory Blood Pressure Monitor Service Manual ABP System Options ABP analysis systems are used to program the ABP monitor, retrieve collected patient data, and generate blood pressure reports from the acquired data. Current analysis systems available are: • Model 90121 Ambulatory Blood Pressure Report Management System •...

  • Page 9: Installation

    Installation Contents Hardware Requirements ..........1 Setup Instructions for the 90121 .

  • Page 10: Setup Instructions For The 90219 And 92506

    90207 Ambulatory Blood Pressure Monitor Service Manual Setup Instructions for the 90219 and 92506 Note: Refer to the 90219 Ambulatory Blood Pressure PC Base Station Interface (P/N 070-0238-xx) or the 92506 Ambulatory Blood Pressure Report Management System Client Application (P/N 070-0932-00) for setup and operating instructions.

  • Page 11: Theory

    Theory Contents Power Supplies ............1 90207 Block Diagram .
  • Page 12 90207 Ambulatory Blood Pressure Monitor Service Manual Power Enable The power converter is activated when main battery voltage (+VPS) is first applied to the converter’s step-up inductor. Three control lines determine if the +VPS supply is turned ON: • PWR_ENABLE •...

  • Page 13: Other Power Sources

    90207 Ambulatory Blood Pressure Monitor Service Manual Other Power Sources In addition to the regulated power supplies, there are five other power sources in the 90207: +VSW, +VPS, +VSB, +VAA, and +VBB +VSW is the voltage coming directly from the unit’s main batteries through the power ON/OFF switch.

  • Page 14: 90207 Block Diagram

    90207 Ambulatory Blood Pressure Monitor Service Manual 90207 Block Diagram +8.6 Ref 4 AA cells +4.7 V power serial transmitter/ LCD screen +5 UR comm. port supply receiver 3 volt lithium +10 UR backup battery -5 UR ON/OFF central processing batteries switch data/control...

  • Page 15: Wake Up And Power Up Logic

    90207 Ambulatory Blood Pressure Monitor Service Manual Wake Up and Power Up Logic The 90207 power up sequence can be initiated by any of the following actions: • Power START/STOP switch turned ON • START/STOP switch depressed • REAL TIME CLOCK generates minute change pulse •...

  • Page 16: Minute Pulse

    90207 Ambulatory Blood Pressure Monitor Service Manual Minute Pulse The clock produces a pulse with a duration of 30 seconds every minute. The leading edge of this pulse causes the minute timer flip-flop to change states. A narrow pulse (about 500 nsec) is generated that also resets the flip-flop.

  • Page 17: Fault Shutdown

    90207 Ambulatory Blood Pressure Monitor Service Manual Fault Shutdown The fault shutdown circuitry causes the power converter to shut down. It also disables the pressure pump and opens the pressure release valve until the shutdown circuit times out in approximately 25 seconds. Shutdown can be caused by two conditions: •...

  • Page 18: Oscillometric Amplifier

    90207 Ambulatory Blood Pressure Monitor Service Manual Oscillometric Amplifier The first two stages of the oscillometric amplifier are a 2-pole low-pass filter and a 2-pole high- pass filter. Together, these filters produce an insertion loss of 30%. The center frequency of the pass band is 2 Hz;...

  • Page 19: Addressing And Control Lines

    90207 Ambulatory Blood Pressure Monitor Service Manual Addressing and Control Lines Unit addressing and control is accomplished with a combination of microprocessor ports, two latches, and one-half of a multiplexer circuit. The 74HC174 latch controls the motor, valve, alert, gain switching, and hold line. A 74HC373 provides address latching for the RAM. Communications RS-232 Connector The 90207 communications connector is a modified RS-232 interface.

  • Page 21: Maintenance

    Maintenance Contents Cleaning ............1 Battery Replacement .

  • Page 22: Battery Replacement

    90207 Ambulatory Blood Pressure Monitor Service Manual Battery Replacement Two types of replaceable batteries are used in the 90207 ABP Monitor: four AA batteries (Spacelabs Medical part number 146-5011-00) that power the cuff air pump, and one lithium battery (3 volts, Spacelabs Medical P/N 146-0008-00) that preserves the information held in the monitor’s memory circuits.

  • Page 23: Lithium Battery

    90207 Ambulatory Blood Pressure Monitor Service Manual Note: • The monitor will not operate if either the alkaline or the lithium batteries are incorrectly installed. • If the monitor is going to be stored for over two weeks, remove the batteries to prevent the possibility of leakage or discharge.

  • Page 24: Installation Instructions

    90207 Ambulatory Blood Pressure Monitor Service Manual Installation Instructions 1 Remove the battery cover from the 90207. Refer to Figure 4-2: Battery contact clip installation. 2 Using a fine-tipped flat screwdriver, remove the three twin-spring contacts ( ) by gently prying the contacts out from under the molded retaining hooks ( Note: Use extreme care not to break the retaining hooks.

  • Page 25: 90207 Disassembly Procedure

    90207 Ambulatory Blood Pressure Monitor Service Manual 90207 Disassembly Procedure To remove the top case cover and gain access to the internal components: 1 At the rear of unit, use two small screwdrivers (or similar tools) to press in on the cover’s two locking tabs until the tabs both clear contact with the rear panel (the tabs are located on each side of the infrared connector, refer to Figure 4-3: Top cover removal).

  • Page 26: Accuracy Procedure

    90207 Ambulatory Blood Pressure Monitor Service Manual Accuracy Procedure To check the accuracy of the monitor: 1 Disconnect the cuff hose from the monitor. Connect the T-tube splitter to the monitor pneumatic connector and the sphygmomanometer. 2 Wrap the pressure cuff around the rigid cylinder, and then fasten the cuff. Connect the cuff hose to the remaining connection on the T-tube splitter.
  • Page 27 90207 Ambulatory Blood Pressure Monitor Service Manual 3 Press START/STOP on the monitor; the monitor should read approximately 165. Compare the readings on the monitor and the manometer as the pressure bleeds down. The monitor reading should be within three millimeters or 2% of the manometer reading, whichever is greater (±...

  • Page 28: Calibration Procedures

    90207 Ambulatory Blood Pressure Monitor Service Manual Calibration Procedures Complete the following procedures to calibrate the Model 90207 ABP Monitor. Test Equipment Required Note: Any test equipment listed below can be replaced with equivalent models. • 1 Tektronix 7603 or TDS420 oscilloscope •...

  • Page 29: Solvents/Compounds Required

    90207 Ambulatory Blood Pressure Monitor Service Manual Solvents/Compounds Required • Isopropyl alcohol • Rosin core solder 90207 Main Board Components Refer to Figure 4-5 to identify test points and other components when conducting calibration and verification procedures for PCBAs P/N 670-0303-10 (and earlier versions). SW910 SW860 TP731...
  • Page 30 90207 Ambulatory Blood Pressure Monitor Service Manual Figure 4-6: Main board components (front view) for P/N 670-0303-11 (and later versions) 4-10...

  • Page 31: Computer System Setup

    90207 Ambulatory Blood Pressure Monitor Service Manual D534 Figure 4-7: Main board components, back view, for P/N 670-0303-11 (and later versions) Computer System Setup The following equipment is required to set up the test computer required for 90207 calibration: • IBM PC (or compatible) loaded with manometer mode software (P/N 063-0165-00) •...
  • Page 32 90207 Ambulatory Blood Pressure Monitor Service Manual To set up the computer system (refer to Figure 4-8): computer system block diagram 90219 IBM PC with 90219 90207 software IR cable 012-0097-xx Figure 4-8: Computer system block diagram 1 Connect power to the 90209 Data Interface Unit. 2 Connect the 90209 to PC cable between the 90209 and the IBM PC.

  • Page 33: Power Supply Check

    90207 Ambulatory Blood Pressure Monitor Service Manual Power Supply Check To check the Model 90207 power supply: 1 Set your oscilloscope as shown below. Time/Div 5 ms Volts/Div 10 mV Mode AUTO + Input Coupling HF -3 dB Point 10kHz LF -3 dB point 2 Set the power supply output to 5.7 VDC ±0.1 VDC.
  • Page 34 90207 Ambulatory Blood Pressure Monitor Service Manual 5 Slide the ON/OFF switch to the ON position and verify the following: The LCD shows the current ROM version number followed by the time. A sleeping current draw of less than 300 µADC (monitor is in sleep state when LCD shows time).

  • Page 35: Amplifier Calibration

    90207 Ambulatory Blood Pressure Monitor Service Manual Table 2: Specifications for Board Assemblies P/N 670-0303-11 and later versions Voltage Ripple Supply Location Range (VDC) (VDC) (mVPP) ADR Low 1.022 1.009 to 1.035 <10 +4.7 V 4.69 to 4.71 <50 +5 V UR 5.45 5.1 to 5.65 <100...
  • Page 36 90207 Ambulatory Blood Pressure Monitor Service Manual to 90207 sphygmomanometer squeeze bulb two-hole can Figure 4-10: Sphygmomanometer test configuration 6 Connect the 90207 monitor to the PC and run the manometer mode software. 7 Manually pump the bulb to apply 200 mmHg pressure to the system. 8 Verify a voltage reading of between 3.060 VDC and 3.070 VDC at TP630 (sphygmomanometer and display must read 200 mmHg).
  • Page 37 90207 Ambulatory Blood Pressure Monitor Service Manual Overpressure Detector 1 Monitor U440 pin 7 with an oscilloscope for main board assemblies P/N 670-0303-10 (and earlier versions). Monitor N57 for main board assemblies P/N 670-0303-11 (and later versions). Refer to Figure 4-7 on page 4-11. 2 Slowly increase the pressure while observing the manometer.
  • Page 38 90207 Ambulatory Blood Pressure Monitor Service Manual 2.5-Hz Signal on Percentage Scale 100% Figure 4-11: Signal on percentage scale 5 Decrease the frequency until the amplitude is 70%. 6 Verify that the frequency is 0.9 to 1.1 Hz. 7 Increase the frequency until the amplitude is at 70%. 8 Verify that the frequency is from 5 to 7 Hz.
  • Page 39 90207 Ambulatory Blood Pressure Monitor Service Manual 3 Remove the four AA batteries from the main battery compartment of the 90207. 4 Connect the 5.7 VDC power source to the 90207 at the main battery terminals. 5 Turn ON the 90207. The display shows the current ROM version and then the current time; the colon will be flashing.

  • Page 40: Operation Verification

    90207 Ambulatory Blood Pressure Monitor Service Manual Operation Verification The following procedures verify that the 90207 ABP monitor’s blood pressure readings are consistent with design standards. Note: These procedures refer to use of the DynaTech Nevada CuffLink Blood Pressure Simulator. If you are using a different simulator, refer to its operator’s manual to determine equivalent tests.
  • Page 41 90207 Ambulatory Blood Pressure Monitor Service Manual 90207 Preparation 1 Set up the ABP monitor by connecting it to the CuffLink. 2 Refer to the table below for a list of systolic/diastolic/heart rate settings to perform on the unit under test. Pressure Setting Range...
  • Page 42 90207 Ambulatory Blood Pressure Monitor Service Manual 3 Connect the unit under test to the simulator, as illustrated in Figure 4-12. Adult Cuff 90207 ABP CuffLink Monitor 1/8” ID x 6” Simulator 1/8” ID x 12” 1/8” ID x 108” T-connector Figure 4-12: Test connection 4 Move the CuffLink cursor to SelectBp and press the ENT key to select ADAMS Adult.

  • Page 43: Cufflink Manual Operation

    90207 Ambulatory Blood Pressure Monitor Service Manual CuffLink Manual Operation The following steps outline the manual selection of simulated blood pressures and heart rates. These may be used to repeat a reading which was out of range or produced no reading. 1 When the CuffLink is warmed up, move the cursor to the SelectBp option of the Main menu and ADAMS Adult.

  • Page 45: Troubleshooting

    Troubleshooting Contents Overview ............1 Monitor Event Codes .

  • Page 46: Base Station Report Event Codes

    90207 Ambulatory Blood Pressure Monitor Service Manual The following codes may also appear on the monitor display. Low battery. The battery did not have sufficient power to operate the pump and complete a measurement. No retry attempt is made following an LLL message. Low backup battery.
  • Page 47 90207 Ambulatory Blood Pressure Monitor Service Manual Monitor Displays --- Base Station Report Prints EC02 Did not reach initial cuff pressure. The cuff may have been improperly applied or there may be an air leak. Overpressure Overpressure No cuff attached Kinked hose Cuff applied too loosely Kinked hose...
  • Page 48 90207 Ambulatory Blood Pressure Monitor Service Manual Monitor Displays --- Base Station Report Prints EC05 Equipment malfunction. Return it to Spacelabs Medical for service. Unit failed to initialize. Please reinitialize. At least one of the blood pressure or time reading obtained before the event code is erroneous.
  • Page 49 90207 Ambulatory Blood Pressure Monitor Service Manual Monitor Displays --- Base Station Report Prints EC08 Too few data entries to accurately determine blood pressure Diastole above 200 mmHg Pulse pressure less than 16 mmHg Monitor Displays --- Base Station Report Prints EC09 Hardware fault (valve open with pump turned ON).

  • Page 50: Problem Solving Checklist

    90207 Ambulatory Blood Pressure Monitor Service Manual Problem Solving Checklist Use this table to diagnose a monitor problem: Table 1: Troubleshooting Problem Possible Cause Solution Modem indicators Modem switch settings are incorrect. incorrect Monitor display Check modem cable for tight No data transfer.

  • Page 51: Parts

    Parts Contents 90207 Field Replaceable Parts Lists ........1 Drawings .

  • Page 52: Drawings

    90207 Ambulatory Blood Pressure Monitor Service Manual Description Part Number Reed switch 260-0036-00 Shield, static protection 337-0085-01 Spring, normal double battery 214-0129-02 Spring, reverse/double battery 214-0125-02 Spring, single/conical Battery 214-0122-00 Spring, single/flat battery 214-0126-01 Transducer, pressure, 0-15 PSI, SC7541 117-0006-00 Tubing, .078 ID (10 feet) 166-0007-00 Tubing, .104 ID (10 feet)

  • Page 53: Symbols

    Symbols The following list of international and safety symbols describes all symbols used on Spacelabs Medical products. No one product contains every symbol. Symbol Description Symbol Description HELP Key Keyboard Connection SPECIAL FUNCTIONS Key Mouse connection RECORD Key START/STOP Key NORMAL SCREEN Key START/STOP MONITOR SETUP Key...
  • Page 54 90207 Ambulatory Blood Pressure Monitor Service Manual Symbol Description Symbol Description Stand-by STAND-BY Key PAUSE or INTERRUPT Slow Run Reset Power Indicator LED Temporary Shut Off of Alarm Tone Alarm or Screen Indicators Indicator — Remote Control Indicator — Local Control PRINT REPORT Key Indicator —...
  • Page 55 90207 Ambulatory Blood Pressure Monitor Service Manual Symbol Description Symbol Description Data Input/Output Input/Output Input Reset Menu Keys Waveform/Parameter Keys Monitor Setup Set Initial Conditions Menu Select Program Options Access Special Function Menu Return Unit to Monitor Mode Serial Port 1 Serial Port 2 External marker push button SDLC Port...
  • Page 56 90207 Ambulatory Blood Pressure Monitor Service Manual Symbol Description Symbol Description Open Padlock Closed Padlock Down Arrow Up Arrow Hard Drive Power Indicator LED Antenna Mermaid Connector Microphone Omnidirectional Microphone Audio Output, Speaker Activate Telemetry Recorder Network Connection Universal Serial Bus Gas Sampling Port Gas Return Port Remote Alarm;...
  • Page 57 90207 Ambulatory Blood Pressure Monitor Service Manual Symbol Description Symbol Description Protective Earth Ground Functional Earth Ground Replace Fuse Only as Marked Fuse Power supply jack polarity. Equipotentiality Terminal (+ / - signs may be reversed) Alternating Current Direct Current Both Direct and Alternating Current AC/DC Input Amperes...
  • Page 58 90207 Ambulatory Blood Pressure Monitor Service Manual Symbol Description Symbol Description Canadian Standards Association ® ETL Laboratory Approved Approved Risk of Explosion if Used in the Operates on Non-Harmonized Presence of Flammable Anesthetics Radio Frequencies in Europe Attention - Consult Operations or Note Note Service Manual for Description...
  • Page 59 90207 Ambulatory Blood Pressure Monitor Service Manual Abbreviations used as symbols are shown below. Symbol Description Symbol Description Access Codes 1 - 32 1 Through 32 ANT 1 Diversity Antenna System 1 Arr1 Arrhythmia Net 1 ANT 2 Diversity Antenna System 2 ArrNet2 Arrhythmia Net 2 EEG, EMG, or ECG Channel...
  • Page 60 90207 Ambulatory Blood Pressure Monitor Service Manual Symbol Description Symbol Description Temperature 1 Temperature 2 Systolic Temperature 3 Temperature 4 TEMP Temperature Uterine Activity or Umbilical Artery temp Vacuum Connection...

  • Page 61: Appendix A - Electromagnetic Compatibility

    Appendix A — Electromagnetic Compatibility Contents Electromagnetic Emissions ..........1 Electromagnetic Immunity .

  • Page 62: Frequency Separation Distances

    90207 Ambulatory Blood Pressure Monitor Service Manual Frequency Separation Distances Note: The ABP monitor is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer, or user, of the module can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the module, as recommended below, according to the maximum output power of the communications equipment.
  • Page 63 90207 Ambulatory Blood Pressure Monitor Service Manual Rated Maximum Separation Distance According to Frequency of Transmitter Output Power of (meters) Transmitter 150 kHz to 80 MHz 80 MHz to 800 MHz 800 MHz to 2.5 GHz (watts) 0.01 0.02 0.02 0.04 0.06 0.06...

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